the diagram for the light system is scattered over few pages, so i had to build a small puzzle. i also apologize for the low quality pictures taken with my cellphone.
first, this is where you can see the main power line (red wire) going into the switch.
if you follow the line to another page, you can see it goes to the current distributor.
the current distributor is basically a junction box from the battery positive lead, backed up by 80 amp fuses. it's located behind the ac air box.
now, this is the line that comes out of the switch (white/black), splits in two, goes to the fuse box, and on the other end, change colors and go to each individual head light.
on the other side of the fuse box the colors changes to yellow/black for the left headlight, and yellow for the right.